Table 2.
Patient demographics and baseline characteristics
| Variables: Median (IQR) or No. (%) | VLG (N = 2070) | VASG (N = 180) | P value |
|---|---|---|---|
| Age (y) | 66 (59, 73) | 67 (59, 74) | .9678 |
| Sex (male) | 1404 (67.8%) | 124 (68.9%) | .77 |
| BMI (kg/m2) | 26.6 (23.7, 29.7) | 26.6 (24.2, 29.7) | .65 |
| Smokers (current or ex-smokers) | 1707 (82.5%) | 136 (75.5%) | .04 |
| Previous thoracic surgery | 96 (4.7%) | 18 (10.0%) | .001 |
| Ipsilateral | 32 (1.6%) | 4 (2.2%) | |
| Contralateral | 53 (2.6%) | 14 (7.8%) | |
| Bilateral | 11 (0.5%) | 0 | |
| Previous oncological disease | 719 (37.8%) | 89 (49.4%) | <.001 |
| Previous lung cancer | 53 (2.9%) | 14 (11.1%) | <.001 |
| Predicted postoperative FEV1 (%s) | 72.2 (61.2, 84.5) | 75.2 (62.6, 90.9) | .002 |
| Predicted postoperative DLCO (%) | 65.7 (54.7, 78.1) | 72.9 (59.9, 85.9) | .001 |
| Diagnosis | .001 | ||
| Lung carcinoma | 1819 (87.9%) | 126 (70.0%) | |
| Lung metastases | 141 (6.8%) | 31 (17.2%) | |
| Other | 110 (5.3%) | 23 (12.8%) | |
| Pathologic stage | <.001 | ||
| 0 | 14 (0.8%) | 5 (4.0%) | |
| I | 1178 (56.9%) | 101 (56.1%) | |
| II | 344 (16.6%) | 8 (4.4%) | |
| III | 216 (10.4%) | 7 (3.9%) | |
| IV | 27 (1.3%) | 3 (1.7%) | |
| Tumor location | <.001 | ||
| Central | 501 (27.6%) | 15 (11.9%) | |
| Peripheral | 1317 (72.4%) | 111 (88.10%) | |
| ASA | .57 | ||
| I | 50 (2.4%) | 5 (2.8%) | |
| II | 907 (43.9%) | 70 (38.9%) | |
| III | 1066 (51.6%) | 102 (56.7%) | |
| IV | 44 (2.1%) | 3 (1.7%) | |
| Hemithorax | <.001 | ||
| Right | 1302 (62.9%) | 54 (30.0%) | |
| Left | 768 (37.1%) | 126 (70.0%) | |
| No. of incisions | <.001 | ||
| 1 | 176 (8.5%) | 34 (18.9%) | |
| 2 | 1349 (65.2%) | 114 (63.3%) | |
| Multiportal (≥3) | 545 (26.3%) | 32 (17.8%) | |
| Lobes or segments resected | 2070 (100.0%) | 180 (100.0%) | N/A |
| Right upper lobectomy | 757 (36.6%) | ||
| Middle lobectomy | 150 (7.2%) | ||
| Right lower lobectomy | 393 (19.0%) | ||
| Left upper lobectomy | 444 (21.5%) | ||
| Left lower lobectomy | 326 (15.8%) | ||
| S1 | 15 (8.3%) | ||
| S2 | 9 (5.0%) | ||
| S3 | 8 (4.4%) | ||
| S6 | 31 (17.2%) | ||
| Basal pyramid | 10 (5.6%) | ||
| Nonbasal pyramid lower segmentectomies (S7, S8, S9, S10 or combination) | 5 (2.8%) | ||
| S1 + S2 | 5 (2.8%) | ||
| Left S1 + S2 + S3 | 59 (32.8%) | ||
| Left S4 + S5 | 24 (13.3%) | ||
| Other combination | 14 (7.8%) |
IQR, Interquartile range; VLG, VATS lobectomy group; VASG, VATS anatomic segmentectomy group; BMI, body mass index; FEV1, forced expiratory volume in 1 second; DLCO, diffusing capacity for carbon monoxide; ASA, American Society of Anesthesiologists; N/A, not applicable.